All available race results Joop Demmenie
| Date | Race | Rank |
| 24/08 | World Championships Road Race (Amateurs) | 4 |
Rider information for 1937
| Rank | 311 |
| Score | 92 |
| Name | Joop DEMMENIE |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 03/09 | World Championships Road Race (Amateurs) | 3 |
Rider information for 1938
| Rank | 309 |
| Score | 100 |
| Name | Joop DEMMENIE |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| Tour de Luxembourg | ||
| 22/05 | Stage 3 | 9 |
| 23/05 | Stage 4 | 10 |
| 23/05 | General Classification | 10 |
Rider information for 1939
| Rank | 300 |
| Score | 112 |
| Name | Joop DEMMENIE |
| Country | Netherlands |
| Team | Individual |